Neco 2025 Chemistry Question 3

Practice practical question 3 from the 2025 Neco Chemistry examination. This question covers Chemical Bonding .

Neco 2025 Chemistry Practical
Topic: Chemical Bonding
Question 3 NECO • 2025 • CHEMISTRY • practical

A student is to investigate the nature of bonding in three solid compounds: (i) sodium chloride (NaCl), (ii) copper(II) sulfate pentahydrate (CuSO4·5H2O), and (iii) iodine (I2). Using the laboratory facilities available, the student will carry out an electrical conductivity test of each compound in distilled water and record observations.

Question Parts

( a )
Describe the complete procedure for testing the electrical conductivity of each compound when dissolved in distilled water. Include the apparatus required and the steps to be followed.
( b )
State the type of bonding (ionic, covalent or metallic) you would expect for each compound based on the conductivity observations.
( c )
Explain why the observed conductivities differ among the three compounds, relating your answer to the nature of bonding and the particles formed in solution.
( d )
Identify one practical limitation of using the conductivity test alone to determine the type of bonding and suggest an additional test that could complement it.

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About This Question

This is Neco 2025 Chemistry Question 3. It is one of the practical questions from the 2025 Neco Chemistry examination.

The question covers Chemical Bonding .

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